43 CFR 2.12 - When can I expect the response?
(a) Except as described in §§ 2.4 and 2.13 of this part, the bureau to which the request is addressed is responsible for responding to the request and for making a reasonable effort to search for responsive records.
(c) The bureau will make reasonable efforts to search for the requested records. As part of its reasonable efforts, the bureau will search paper and/or electronic records (for example, emails), as appropriate. The bureau will not search for records in an electronic form or format if these efforts would significantly interfere with the operation of the bureau's automated information system.
(d) If a bureau receives a request for records in its possession that it did not create or that another bureau or a Federal agency is substantially concerned with, it may undertake consultations and/or referrals as described in § 2.13.